Rocket J Squirrel said: Commissions and fees are explicitly added to the cost basis of securities.IRS Publication 551:The basis of stocks or bonds you buy is generally the purchase price plus any costs of purchase, such as commissions and recording or transfer fees. https://www.irs.gov/publications/p551#en_US_201812_publink1000256905Quicken can handle this in the "Reinvest" action of investment accounts. Just input the commission as well as the amount reinvested and shares received.
q_lurker said: I find that is you enter a ReinvDiv transaction with correct total dividend and share quantity and with a positive commission in the field, you getA security lot with correct number of shares and cost basis (= total dividend)A dividend record (not a specific transaction) for that total dividend for various report purposesbut Quicken also generates A MiscIncX transaction as an additional Div received (category = _DivInc). The 'X' factor assigns the transfer to the same brokerage account such that the cash balance of the account is not impacted. This results in the dividends for the security being overstated. In my opinion, that MiscIncX transaction should be deleted, or the commission should not be entered in the first place (such that the MiscIncX is then not generated).
Rocket J Squirrel said:The thing is, that commission or fee almost certainly contributes to the security's basis, so that has to be accounted for unless this is a tax-advantaged account.